Which of the following is not a valid JavaScript identifier?

What is the role of reserved keywords in JavaScript identifiers?

A). Can be used as identifiers without issues

B). Cannot be used as identifiers

C). Enhance code performance

D). Ensure code security

What does the term 'case-sensitive' mean for identifiers in JavaScript?

A). Identifiers can have uppercase and lowercase letters interchangeably

B). Identifiers must have consistent capitalization throughout the code

C). Identifiers are not sensitive to case differences

D). Identifiers are sensitive to differences in uppercase and lowercase letters

Which of the following file extensions is commonly used for JavaScript files?

A). JavaScriptIdentifiers.docx

B). JavaScriptIdentifiers.java

C). JavaScriptIdentifiers.js

D). JavaScriptIdentifiers.html

What is the correct spelling for the naming convention starting with uppercase for each word?

A). Pascal_Case

B). pascalcase

C). pascalCase

D). PascalCase

Which naming convention uses hyphens to separate words?

A). CamelCase

B). snake_case

C). Kebab-Case

D). PascalCase

What is the naming convention that starts with a lowercase letter and each subsequent word starts with a capital letter?

A). camelCase

B). Snake_Case

C). kebab-case

D). PascalCase

Which of the following is not a valid JavaScript variable name?

A). $varName

B). first_name

C).

D). _variable

Which naming convention separates words with underscores?

A). camelCase

B). PascalCase

C). snake_case

D). kebab-case

Which of the following is a valid JavaScript function name?

A). function 1

B). function_name

C). function()

D). $function

Which of the following is a valid JavaScript variable name?

A). $varName

B). first_name

C).

D). _variable